Pulley.



No. 833,596 PATENTED 0013.16, 1906.

J. GILBERT. PULLBY.

LPPLIUATIOK FILED JULY 6, 1903.

7n: mamas PETERS co., wasmuoron, 1:. c.

No. 833,596. PATENTED OCT. 16, 1906, H. J. GILBERT.

PULLBY. I, APPLIOATION FILED JULYs. 190s.

s SHEBT SSHEET z.

IIITIIIN fo /M" No. 883,596. PATENTED 001*. 16. I906.

- H; J. GILBERT.

.PULLEY.

APPLICATION FILED JULYB, 1903.

3 SHEETS-SHEET 3.

HENRY J. GILBERT, OF SAGINAW, MICHIGAN.

PULLEY.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed 1T nly 6, 1903. SerialNo. 164,428.

' To all whom, it may concern.-

Be it known that I, HENRY J. GILBERT, residing at Saginaw, Saginawcounty, Michigan, have invented certain new and useful Improvements inPulleys, of which the following is a specification.

My invention relates topulleys; and the ob ject thereof is to produce arigid, eflicient, and durable pulley made from sheet-steel or the likepressed or formed into the novel and original structure illustrated inthe drawings and hereinafter fully described.

In the drawings, Figure 1 is a side elevation of a pulley constructedaccording to my invention; Fig. 2, a diametrical section thereof, butwith one-half of the spoke and hub structure in elevation; Fig. 3, asectional elevation on the line 3 3 of Fig. 4; Fig. 4, a sectional planon line 4 4 of Fig. 1; Fig. 5, a detail View of the hub structure; Fig.6, a per spective of the hub-thimble; Figs. 7 and 8, detail views of arim-clamp, Fi 8 being a section on line 8 8 of Fig. 7; an Figs. 9, 10,and 11 detail views of a modified form of construction of pulley.

As shown, my pulley comprises, essentially, a rim, a hub structure, aclamp, and a series of intermediate radial spokes, all formed andassociated in the novel manner hereinafter explained. I

My invention is shown applied to a pulley of the split or sectionaltype, and consequently the description of one half of the pulley willapply to both halves.

Referring to the first two sheets of drawings, the rim 1, which maybesuitably formed or rolled from sheet-steel or the like, is in thepresent instance inwardly rolled at its central portion to form a web 2.However, any other character of web may be adopted.

Each half of the pulley has in the present instance a series of threespokes 3, which are made in two sections brought together face to faceand secured together, as by means of the rivets 4. In the constructionof pulley illustrated in Figs. 1 to 6 the spokes are made integral withthe clamp 5, formed in the novel manner hereinafter explained.

The spokes 3 are provided with a longitudinal rib 3', having themarginal meeting faces or surfaces 3*, which fit the correspondingspokes or spoke-sections when the two halves or sections of the spokestructure are assembled and secured together. The outer ends of thespokes are secured to the web 2 of the rim in suitable manner, as bymeans of the rivets 6, and by preference the edge of the web immediatelyadjacent the spokes is swaged or flanged laterally in both directions toform the flanges 7, Fig. 2, which fit at the upper ends of the grooves,resulting in the spokes from the provision of the ribs described. Thefunction of these flanges is to relieve the rivets 6 from the shearingstrains caused by the rotarial and centrifu al forces, and therebyprovide a rigid an eflicient connection between the rim and outer endsof the spokes, which feature is described and claimed in anotherapplication filed by me on June 8,1903, Serial No. 160,523. The innerends of the spokes are joined by atriangular web 3, through which rivets4. pass, whereby such ends of the spokes are materially strengthened.

As described, the spokes, hub, and clamp are formed integral from asingle blank of sheet-steel or the like, and to this end the blank isflanged outwardly toform the hubflange 8, Figs. 2, 3, 4, and 5, anda'triangular portion is cut away from the corners of the side flanges 10may be folded at substantially right angles to the flange 8, Figs. 3, 4,and 5. The curved flange 8 constitutes the hub portion, and the lateralstraight or flanged portions constitute the clamp, the same being a boxor bearing for the usual clamping-bolts 12, Fig. 3. Thus in the pulleybeing described the spokes, hub, and clamp portion of each section ofeach half of the pulley are formed in a single integral structurethatis, a complete pulley has four of these sections comprising spokes, hub,and clamp.

Within the combined spokes, hub, and clamp thus formed, as aboveexplained, is arranged a hub-thimble 13, which in the present instanceis made in two semicircular sections, one of which is illustrated inFig. 6. In order to effectually brace or support the bolt flange or box,and thereby afford something for the bolts to pull against, I cut orstamp from the body of the thimble triangular tongues 14, which are bentoutwardly in such manner that the straight edges 14 bear against theinner face of the flanges 11, and thereby support the same, as clearlyindicated in Fig. 3. Each section of the thimble has four of thesetongues, as shown, to support the four flanges or boxes 11 of each halfof the complete pulley.

In pulleys of the class herein descrlbed great strain is exerted uponthe rim-clamps,

blank, as at 8, so that the end flanges 9 and Ice and consequently theprovision of proper clamps of this character is of vital importance. Inthe present instance I have devised a simple and efficient form ofrim-clamp, the same comprising, in general terms, two telescopingmembers secured, respectively, to the meeting ends of the rim and heldor clamped together in suitable manner. Referring to Figs. 7 and 8, oneof the rim-clamping members consists of two plates 15 and 16 of metaltransversely folded at the middle to form a tubular portion and arrangedto fit upon and be secured to opposite sides of the web 2 of the rim bymeans of rivets 17 or otherwise. The extreme ends of these strips orplates are bent laterally and secured to the inner face of the rim onopposite sides of the web by rivets 18, as seen in Fig. 8. The strip orplate 16 is the inner one, and the same slightly projects beyond theouter edge of the other plate in such manner as to lap beyond the jointformed between the plate or strip 15 and the corresponding plate orstrip of the other clamping member, as seen in Fig. 7. To form thetubular portion of the clamp the strips or plates 15 and 16 are rivetedtogether byarivet 19. The other clamping member consists of two stripsor plates 20 and 21, formed similar to the other member but the plate 21is as much less in width as the plate 16 exceeds plate 15 in width, withthe result that the plate 16 projects or telescopes within the tubularportion formed by the plate 20. The plates 20 and 21 are secured to theweb by a rivet 22, to the rim by rivets 23, and to each other by a rivet24. When the meeting ends of the rim are brought together, the plates 15and 20 abut, while the plate 16 telescopes Within the plate 20, and thusbreaks the joint between the clamps proper. The parts are then heldtogether by a clamping-bolt 24, passing through the tubular portions ofthe clamping members.

In Figs. 9, 10, and 11 is illustrated a modified form of constructionsimilar to the one hereinbefore described, excepting that the clamp ismade separate from instead of integral with the spoke and hub structure.As shown, the inner ends of the spokes are flanged laterally to form thesemicircular flange 8. The separate clamp consists of a plate 25, havingalternating straight and curved edges to fit into or interlock with thespokes, as seen in Fig. 10. This clampingplate is provided with a curvedflange 26, fitting upon the semicircular flange 8, and with lateral flatflanges 27, forming the bearing surfaces or boxes for the clamping-bolts12. The same rivets 4 which secure the spokesections at their inner endstogether also serve to secure the plates 25 upon opposite sides of thespoke structure. If desired, a hub ,thimble or sleeve 13 may be used;but this is not essential.

I claim 1. A split pulley formed of sheet metal, each half or sectionthereof being composed of a rim half or segmentand of a plurality ofradial spoke-arms and a hub portion, the several spoke-arms of eachpulley-half being formed in two integral sections which meet at theirinner faces and are secured together along their entire len th.

2. A split pulley formed of sheet metal, each half or section thereofbeing composed of a rim half or segment and of a plurality of radialspoke-arms and a hub portion, the several spoke-arms of each pulley-halfbeing formed in two integral sections and each hub portion beingextended longitudinally and transversely of the axis of rotation.

3. A split pulley formed of sheet metal, each of whose halves iscomposed of half rim, spokes, and hub, said spokes and hub being formedin two separate sections each of which consists of connectedradially-ribbed spoke-armswith meeting faces 3 and an integral hubportion.

4. A split pulley formed of sheet metal and each of Whose halves iscomposed of a half rim and of spokes and hub formed in two separatesections, each section consisting of a series of ribbed spoke-arms withmeeting faces 3 and connectin -webs 3 and 9 an integral hub portion,each 0 said sections being formed in a single piece and arranged to besecured together at such meeting faces and said webs to form hollowspokes with integral hub. i r

5. A pulley comprising a rim in combination with a plurality ofspoke-arms, hub and clamping portion made in corresponding sectionssecured together, each section consisting of a component part or portionof the spokes, hub and clamping portion formed in a single integralstructure with the hub portion extended longitudinally and transverselyof the axis of rotation.

6. A split pulley each half of which comprises a rim portion and spokes,hub and clamp portion formed in two integral sections secured togetherand to the rim, the clamp portion of each section consisting of twolateral flanges 11 provided with the end flanges 10 and side flanges 9.

7. A split pulley each half of which comprises a rim portion and spokes,hub and clamping portion formed in two integral sections securedtogether and to the rim, the clamping portion of each section consistingof two lateral flanges 11 provided with the end flanges 10 and sideflanges 9 in combination with a hub-thimble provided with tongues forsupporting the said flanges 11, and bolts passing through such flanges11 for plamping together the two halves of the pul- 8. A split pulleyeach half of which comprises a rim portion and spokes, hub and clampportion formed in two integral sections secured together and to the rim,the clamp portion of each section consisting of two lateral flanges 11provided with the end flanges 10 and side flanges 9 in combination witha hub-thimble having outwardly pressed from its sides tongues 14 forsupporting the .said flanges 11, and bolts 12 passing through suchflanges 1 1 for clamping together the two halves of the pulley.

9. A rim-clamp device for split pulleys consisting of clamps secured tothe respective meeting ends of the pulley-rim, each clamp comprising twoplates arranged to telescope with the plates of its adjacent clamp withwhich it engages.

10. A rim-clamp device for split pulleys consisting of two clampssecured to the respective meeting ends of the pulley-rim on the sameline as the oint between such meeting ends, each clamp comprising aninner plate and an outer plate folded upon itself and secured to therim, the inner plates of said clamps breaking joint with the outerplates, and means for securing the two clamps together.

11. A rim-clamp device for split pulleys consisting of two clampssecured to the respective meeting ends of the pulley-rim, each clampcomprising two plates folded together at the middle to form a tubularportion and secured to the rim but the inner plate 16 of one clampprojecting beyond the outer edge of its outer plate and the inner plate21 of the other clamp being of less Width corresponding substantially tothe excess width of the plate 16, and a bolt 24 for securing the twoclamps together.

12. A split pulley each half of which comprises a rim, spokes connectedtherewith at their outer ends and having .a combined hub and clampportion at their inner ends extending longitudinally and transversely ofthe axis of rotation, and a split hub-thimble each half of which isprovided with means for sup orting said hub and clamp portion.

13. split pulley each half of which comprises a rim, spokes connectedtherewith at their outer ends'and having a combined hub and clampportion at their inner ends, and a hub-thimble provided with lateral proections for supporting said hub and clamp portion.

14. A split pulley each half of which comprises a rim, spokes connectedtherewith at their outer ends, and having a combined hub and clampportion at their inner ends, and a hub-thimble rovided with projectionsor wings stamped out from its body for supporting said hub and clampportion.

15. A split pulley each half of which comprises a rim, spokes connectedtherewith at their outer ends and having a hub provided with lateralextensions to form a clam ing portion, and a split hubthimble, each alfof which is provided with wing-like lateral projections arran edadjacent the said lateral extension of the 1ub for supporting thelatter.

16. A pulley comprising a rim, spokes and clamping portion at the innerends of the spokes, in combination with a hub-thimble provided withlateral projections for supporting the said clamping portion of thepulley.

17. A pulley comprising a rim, spokes and clamping portion at the innerends of the spokes, in combination with a hub-thimble provided withwings stamped out from its body and extended outwardly to support saidclamping portion of the pulley.

18. A pulley comprising a rim, spokes and clamping portion at the innerends of the spokes, in combination with a hub-thimble provided withtriangular shaped wings stamped out from its body and extended outwardlyto support said clamping portion of the pulley.

19. A pulley comprising a rim, spokes secured at their outer ends to therim and outwardly flanged at their inner ends to form a hub portlon 8and clamping portions of flanges 11, in combination with a hubthim bleprovided with lateral projections for supporting the clamping portions11. of the pulley.

20. A pulley comprising a rim, spokes secured at their outer ends to therim and outwardly flanged at their inner ends to form a hub portion 8and clampin portions or flanges- 11, in combination Wit a hub-thinlbleprovided with wings stam ed out from its bodyand extended outward y tosupport said clamping portions 11 of the pulley.

21. A rim-clamp device for split pulleys consisting of clamps secured tothe respective meeting ends of the pulley-rim, each clamp com rising aninner and outer plate secured to t 1e rim, the inner plates of twoengaging clamps breaking joint With the outer plates,

, comprising, in combination with a splitpulley rim having an inturnedweb, two clamps, each of which consists of an inner and an outer platefolded at the middle and secured together intermediate of their lengthto form a tubular portion, the plates of each clamp being of unequalwidth and arrangedto telesc'o e into each other, said plates of eachclamp being secured to opposite sides of said Web, and a bolt receivedby such tubular portion for securing together two cooperating clamps.

24. A rim-clamp device for split pulleys comprising, in combination witha splitpulley rim having an inturned Web, two clamps, each of whichconsists of an inner and an outer plate folded at the middle and securedtogether intermediate of their length to form a tubular portion, theplates of each clam being of unequal width and arranged to te escopeinto each other, saidplates of each clamp being secured to oppositesides of said Web with their extreme ends bent to conform to thepulley-rim itself and secured thereto, and a bolt passing through saidtubular portion for securing together two cooperating clamps.

HENRY J. GILBERT. Witnesses:

EDWARD REITER, LoUIs B. ERWIN.

